Marquise Lab Grown Diamond Side-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

marquise diamond side-stone engagement ring in white gold

1 of 12

$548.00

Price updates with your selections

Independently graded by IGI IGI Report Included Selected 0.50 ct+ lab-grown center or primary diamond · IGI grading report · Signora Jewelry Certificate included. 1 ct lab-grown diamond · IGI report · Signora Certificate included.

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Complimentary · hand-engraved to order · adds about 3–4 days.

Estimated dispatch: 7 business days Duties & taxes prepaid

Ring size guide

Lay a ring you own flat on the circle and slide until it sits just inside it — or set its inner diameter directly.

Measure the inside of a ring that already fits — inner edge to edge — with a ruler in mm, then set it below. No ring handy? Try Measure your finger.

14 mm 24 mm 17.3 mm

Inner diameter mm

US size

UK size

EU size

Circumference

54.3 mm

Between sizes? Always choose the larger size. Fingers are slightly bigger in the evening — measure then for the best fit.

Method 1 — Use an existing ring

Find a ring that fits the intended finger comfortably.
Place it flat and measure the inner diameter (inside edge to inside edge) in mm.
Enter that measurement in the Measure a ring tab.

Method 2 — Wrap and measure

Wrap a thin strip of paper around the base of your finger.
Mark where it overlaps — measure that length in mm (your circumference).
Divide by 3.1416 (π) to get your diameter, then use the Measure a ring tab.

Tip: Middle finger sizes typically run half a size larger than the ring finger. If between sizes, go up. Measure in the evening — fingers are slightly larger then.

7US size

US	UK	EU	Diameter	Circumference

Highlighted row = your converted size. Most common women's sizes are US 6–7. All measurements in mm.

Selected: —

The Signora Promise

Hand-finished in SuratMade to order

Reports where statedExact scope shown

Insured deliverySigned & tracked

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Standard-design returns30-day eligibility

Final inspectionChecked before dispatch

About This Ring

Marquise Cut ·

Center

Marquise Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.

Detail	In the photos	Customizable
Ring style	Marquise engagement ring with marquise side stones and a diamond-set gallery	Included as shown
Center diamond	Marquise · Approx. 16.00 × 9.00 mm · Approx. 4.000 ct	Yes — 1 to 4.5 ct
Marquise side diamonds	6 diamonds · Approx. 5.00 × 2.50 mm · Approx. 0.600 ct total	Included and scaled with the center
Gallery diamonds	22 round diamonds · Approx. 1.10 mm · Approx. 0.132 ct total	Included and scaled with the setting
Total diamond weight	Approx. 4.732 ct · 29 diamonds	Varies with center size
Stone type	Lab Grown Diamond	Lab Grown Diamond
Setting	Six-prong marquise basket with prong-set side stones and U-cut gallery accents	Scaled to suit the selected center
Band	Graduated marquise shoulders with a plain lower shank	Included as shown
Reference size	US 8	Customer selects
Finish	High Polish	Included

Diamond details

Shape	Size	Qty	Weight (approx.)
Marquise center	16.00 × 9.00 mm	1	4.000 ct
Marquise side stones	5.00 × 2.50 mm	6	0.600 ct
Round gallery diamonds	1.10 mm	22	0.132 ct
Total	—	29	4.732 ct

At a glance

A marquise Lab Grown Diamond side-stone engagement ring from Signora Jewels.

As shown, the ring carries a 4.000 ct center measuring Approx. 16.00 × 9.00 mm, six marquise side stones and 22 round gallery diamonds.

Twenty-nine diamonds total Approx. 4.732 ct in a six-prong center basket with graduated shoulders and a diamond-set gallery.

Made to order in silver, 9K/14K/18K yellow, white or rose gold, and platinum.

Made to order — the price updates with your center size and metal. Change the marquise proportions or shoulder layout through our

custom jewelry service.

Signora Jewels sets the 16.00 × 9.00 mm center in six prongs, including dedicated tip coverage at both pointed ends. Three 5.00 × 2.50 mm marquise diamonds run down each shoulder, aligned point-to-point so the long center flows into the band instead of stopping abruptly.

Twenty-two 1.10 mm rounds sit below the main stones in a U-cut gallery. They catch light from the side and leave the top view focused on the seven marquise outlines. The lower shank stays plain, giving the palm a smooth surface while the diamond work remains concentrated across the finger.

Design highlights

Marquise Lab Grown Diamond center, Approx. 4.000 ct as shown
Approx. 16.00 × 9.00 mm center dimensions
Six marquise side diamonds totaling Approx. 0.600 ct
Approx. 5.00 × 2.50 mm side-stone dimensions
Twenty-two 1.10 mm round gallery diamonds totaling Approx. 0.132 ct
Six-prong center basket with protected tips
Graduated shoulders and a plain lower shank
Approx. 4.732 ct total diamond weight as shown

The marquise sequence controls the spread. Each shoulder carries three smaller pointed stones away from the 4 ct center, while the round gallery diamonds stay below the girdle and appear only when the ring turns.

Diamond & Ring Details

Specification	Details
Center stone	Marquise · Approx. 16.00 × 9.00 mm · Approx. 4.000 ct as shown
Side stones	6 marquise diamonds · Approx. 5.00 × 2.50 mm · Approx. 0.600 ct total
Gallery accents	22 round diamonds · Approx. 1.10 mm · Approx. 0.132 ct total
Total diamond weight	Approx. 4.732 ct across 29 diamonds as shown
Center setting	Six-prong marquise basket with tip coverage
Accent setting	Prong-set marquise shoulders with U-cut round-diamond gallery
Reference size	US 8
Finish	High Polish

Measurements and weights are approximate. The basket, side-stone spacing and metal weight scale with the selected center size.

About Lab Grown Diamonds

A marquise brilliant concentrates light through an elongated outline with pointed ends. The six smaller marquise stones repeat that outline along the shoulders, while the round gallery diamonds create tighter flashes underneath.

Lab grown diamonds share the same carbon crystal structure, hardness and optical properties as mined diamonds. Compare proportions, certification and cut behavior in the diamond and stone guide.

Metal, Care & Fit

Choose silver, 9K/14K/18K gold in yellow, white or rose, or platinum. 9K uses more strengthening alloy, while 18K contains more gold and carries richer color; compare each option in the metal guide.

Order in your known US size. The long center and six side stones spread across the finger, so a secure fit keeps the ring upright. Clean beneath the center basket and inside the U-cut gallery with warm water, mild soap and a soft brush.

FAQ

Can I choose another center diamond size?
Yes. The marquise center is available from 1 to 4.5 ct, and the basket and metal weight scale with the selected carat. The photographed configuration uses an Approx. 4.000 ct center measuring 16.00 × 9.00 mm.

What is the total diamond weight?
The photographed configuration totals Approx. 4.732 ct across 29 diamonds. That includes the 4.000 ct center, six marquise side stones totaling 0.600 ct and 22 gallery diamonds totaling 0.132 ct.

How are the marquise side stones arranged?
Three marquise diamonds run down each shoulder in a point-to-point line. Each side stone measures Approx. 5.00 × 2.50 mm.

How is the center diamond protected?
The center is held by six prongs, with metal positioned at both pointed tips. Those end prongs protect the most exposed parts of the marquise outline.

Where are the round diamonds placed?
The 22 round diamonds sit in the U-cut gallery beneath the center and side-stone line. They measure Approx. 1.10 mm and are most visible from angled and side views.

Will a wedding band sit beside this ring?
A straight wedding band reaches the plain lower shank but leaves a narrow gap beside the raised gallery. A contoured band follows the underside of the side-stone setting more closely.

How does a six-prong setting compare with a four-prong setting?
A six-prong marquise setting adds dedicated support around the pointed ends, while a four-prong setting leaves more of the outline exposed. This basket uses six contact points for the 16.00 × 9.00 mm center.

Are all diamonds included?
Yes. Signora Jewels includes the selected center, all six marquise side stones and all 22 round gallery diamonds in the completed ring.

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